From 5aef21f61ee527c857a5837ed65b45cd4aec04b6 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Wed, 9 Jun 2021 10:40:33 +0200
Subject: [PATCH] Fix SearchEngineConvertInnoDbWorker when MySQL is not the
 active engine

Fixes #4192
---
 .../system/worker/SearchEngineConvertInnoDbWorker.class.php   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/system/worker/SearchEngineConvertInnoDbWorker.class.php b/wcfsetup/install/files/lib/system/worker/SearchEngineConvertInnoDbWorker.class.php
index 76775ff6e2..d3050da5c3 100644
--- a/wcfsetup/install/files/lib/system/worker/SearchEngineConvertInnoDbWorker.class.php
+++ b/wcfsetup/install/files/lib/system/worker/SearchEngineConvertInnoDbWorker.class.php
@@ -78,7 +78,9 @@ class SearchEngineConvertInnoDbWorker extends AbstractRebuildDataWorker
                 $table,
                 WCF::getDB()->getDatabaseName(),
             ]);
-            if ($checkStatement->fetchSingleColumn() !== 'innodb') {
+
+            $engine = $checkStatement->fetchSingleColumn();
+            if ($engine !== false && $engine !== 'innodb') {
                 $sql = "ALTER TABLE " . $table . " ENGINE = InnoDB";
                 $statement = WCF::getDB()->prepareStatement($sql);
                 $statement->execute();
-- 
2.20.1